Barrel pump assembly



Oct 1969 E. P. SUNDHOLM 3,473,479

BARREL PUMP AS SEMBLY Filed July '7, 196'? 2 Sheets-Sheet l//IIIIIIIIIIIIII';???II IIIII.

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EDWIN P. SUNDHOLM Oct. 21, 1969 E. P. SUNDHOLM BARREL PUMP ASSEMBLY 2Sheets-Sheet 2 Filed July 7, 1967 FIGS v L 3 x w 3 8 2 xvi|l 0 v f/lM/Va 4 v. .m. 4 3 4 b a w 7 f 3 m. 2 o w. 6 3 3 8 3 6 2 A A/ \\\\\i /3 m 31.\"v'E.\'T0R: EDWIN P. SUNDHOLM US. Cl. ltl3218 3 Claims ABSTRAQT OFTHE DISCLOSURE A barrel pump assembly which includes a cylinder and abase. The cylinder is slidably received in the base and is releasablysecured therein by cone-shaped lugs or projections extending outwardlyfrom the cylinder and base and a clamp. The clamp is provided withrecesses which receive the projections and prevent movement of thecylinder projections with respect to the base projections and which urgethe cylinder into fluid-tight engagement with the base. The base isprovided with spaced outer and inner side walls to provide an airpassage from the bottom of the base to the side of the base.

BACKGROUND OF THE INVENTION Barrel pumps are generally provided with abase which is adapted to be threadedly engaged with the bung of abarrel, a pump cylinder which is threadedly received by the base, and aspout which is threadedly engaged with the top of the pump cylinder.When the pump is inserted into the barrel, it is desirable to have thespout extending over the top of the barrel so that the container that isto be filled by the pump may be supported by the top of the barrel.However, after the pump is screwed tightly into the bung, the spoutfrequently extends over the side of the barrel rather than the top. Inorder to reposition the spout, the operator would continue to exertrotational force on the spout and the cylinder, and frequently thegaskets and threads at both ends of the cylinder would be damaged. Whenthe operator attempted to remove the pump from the barrel, he wouldoften cause the spout to unscrew from the cylinder or the cylinder fromthe base rather than unscrewing the base from the barrel.

SUMMARY OF THE INVENTION The inventive barrel pump assembly eliminatesthe foregoing disadvantages. The spout may be permanently secured to thecylinder without the use of threads, and the cylinder is releasablysecured within the base without any threads by lugs and a clamp. If thespout is positioned incorrectly after the base has been screwed tightlyinto the barrel, the clamp may be loosened and the cylinder may berotated with respect to the base to reposition the spout over the top ofthe barrel. Tightening the clamp urges the cylinder into a fluid-tightseal with the base, and when the clamp is in place, the pump can beunscrewed from the barrel without unscrewing the cylinder from the base.The unique base further provides a large air vent to ensure smoothoperation of the pump and is located so that water cannot seep into thebarrel.

DESCRIPTION OF THE DRAWING FIG. 1 is a perspective view of the inventivebarrel assembly positioned in a barrel;

FIG. 2 is an elevational sectional view of a barrel pump provided withthe inventive barrel pump assembly;

FIG. 3 is an enlarged fragmentary view of a portion of FIG. 2;

FIG. 4 is a fragmentary view showing the clamp and lug means;

ite States Patent F 3,473,479 Patented Oct. 21, 1969 FIG. 5 is a planview of FIG. 4 with the clamp rotated about 45;

FIG. 6 is a fragmentary section view of the lug means with the clamp inplace;

FIG. 7 is a view similar to FIG. 6 showing the lug means before theclamp is tightened;

FIG. 8 is a sectional view of the clamp; and

FIG. 9 is an exploded sectional view similar to FIG. 3.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to FIG. 1, thenumeral 10 designates generally a barrel pump which is threadedlyengaged with the top 11 of a barrel or drum 12. The bung or threadedhole of the barrel top 11 which receives the pump is usually locatedadjacent the periphery of the barrel top. When the barrel pump 10 ispositioned in the barrel, it is generally preferable to have the spout13 of the pump extend radially inwardly over the barrel top so that thecontainer 14 which is to be filled may be supported by the barrel topwhile the pump is operated.

Referring now to FIG. 2 the pump 10 is seen to include spout 13 whichextends outwardly from spout head 14, and handle 15 which is pivotallysecured to the spout head 14 by means of link 16 and bracket 17. Thespout head is inserted over the top of elongated pump cylinder 18 and ismaintained in sealing engagement therewith by O-ring 19. The spout headand the pump cylinder may advantageously be permanently secured as byspot welding. Piston 20 is carried by piston rod 21, which is slidablyreceived by the spout head and pivotally secured to the handle 15.

Base 22 slidably receives the lower end of cylinder 18, and suction tube23 is threadedly engaged with the lower end of base 22. Suction tube 23advantageously includes inner and outer telescoping members 24 and 25,respectively (see FIG. 1) with an O-ring disposed therebetween.

As can be seen best in FIG. 3, base 22 includes a generally cylindricalouter shell 26, an outer sleeve 27, and an inner sleeve 28-. The outersleeve 27 is generally cupshaped and is received by the outer shell 26.If desired the outer shell and outer sleeve may be permanently securedas by spot welding. The wall 29 of the outer sleeve is provided withthreads 30 to engage the threaded bung of the barrel, and the bottom 31of the outer sleeve is provided with an internally threaded upstandingflange 32 which threadedly receives suction tube 23.

Inner sleeve 28 is also generally cup-shaped and extends generallyupwardly from flange 32 and flares outwardly as at 33 toward the wall 29of the outer sleeve.'= The bottom of the inner sleeve is provided withopening 2817 which receives the flange 32, and O-ring 34 may be insertedbetween the inner sleeve 28 and the bottom 31 of the outer sleeveadjacent flange 32 to provide a fluid-tight seal therebetween. The wall28a of the inner sleeve is spaced from the wall 29 of the outer sleeveto provide air passage 35 which connects opening 36 provided through thewalls of the outer sleeve 27 and the outer shell 26 and opening 37provided through the bottom wall of the outer sleeve.

The outer shell 26 extends outwardly above the threads 30 of the outersleeve to form collar 38 which receives O-ring 38a. When the bodyportion is threaded into the bung of the barrel, the O-ring 38amaintains a fluid-tight seal between the pump and the barrel. Airopening 36 is positioned above the collar 38 and communicates with thebarrel interior by means of air passage 35 and air opening 37. Theposition of air opening 36 in the side of the base spaced from the topof the barrel substantially eliminates the possibility of water seepinginto the drum through the air vent.

Valve cage 40 is positioned within base 22 above the outer sleeve 27 andis provided with an annular valve seat 41. The periphery of the valveseat is received by a circular gasket 42 which is seen to be generallyU- shaped in cross section. Valve 43 is carried by the valve cage 40 andis urged into sealing engagement with the valve seat 41 by spring 44.The valve cage and gasket 42 are removably wedged within outer shell 26and are supported by flare 33 of the inner sleeve 28.

Referring now to FIGS. 4 and 5, base 22 is seen to be provided adjacentthe top thereof with circumferentially spaced lugs or projections 45.Pump cylinder 18 is provided with similar lugs 46 extending outwardly ata point slightly above the top of base 22 when the pump cylinder isreceived by the base. The lugs 45 and 46 are preferably cone-shaped orbullet-shaped, and in the particular embodiment illustrated both thebase and the pump cylinder are provided with four projections spaced 90apart. It is to be understood that other shapes and arrangements of theprojections may be used.

The pump cylinder and the base are releasably clamped against relativerotational movement by generally cylindrical clamp 47, which preferablycomprises a pair of semi-cylindrical clamp portions 47a and 47b whichare joined by bolts 48 and nuts 49. Each clamp portion is provided witha pair of radially outwardly extending flanges 50 which are providedwith bolt holes 51 for the receipt of the bolts 48. Each clamp portionfurther includes an upper portion 52 having approximately the sameradius of curvature as that of the pump cylinder and a lower portion 53having approximately the same radius of curvature as that of the outershell 26. As can be seen best in FIG. 8, the upper clamp portion 52 isprovided with recesses 54, and the lower clamp portion 53 is providedwith recesses 55. The inside surfaces of recesses 54 and 55 haveapproximately the same contour as the outside surfaces of lugs 46 and45, respectively, and the circumferential spacing of the recesses isapproximately the same as the spacing of the lugs.

The spacing of the base lugs 45 from the top of the base, the spacing ofthe pump cylinder lugs 46 from the bottom of the pump cylinder, and thespacing between the upper and lower recesses 54 and 55 are all such thatwhen the clamp is positioned securely about the pump cylinder and baseand the lugs are received by the recesses, the bottom of the pumpcylinder is urged firmly against the U-shaped gasket 42 to effect afluid-tight seal between the pump cylinder, the outer shell 26, and theinner sleeve 28.

When the clamp is secured, the lugs are received in the respectiverecesses, and the pump cylinder and base are releasably secured againstrelative rotational movement. The shape of the lugs and recesses alsofacilitates urging the pump cylinder into sealing engagement with theU-shaped gasket 42. FIG. 7 illustrates the pump cylinder inserted in thebase before the clamp is tightened. As the bolts 48 are tightened andthe clamp halves 47a and 47b are drawn together, the contours of theconeshaped or bullet-shaped lugs and recesses provide a camming actionwhich urges the pump cylinder downwardly in the direction of the arrowtoward the gasket 42.

In one embodiment of the invention the sides of the recesses 54 and 55form an included angle A of about 92 (see FIG. 8), the depth B of therecesses is about 0.136 inch and the bottom of the recesses are slightlyrounded as at 56 with a radius of about 0.1094 inch. The lugs 45 and 46are similarly shaped. The upper clamp portion 52 has a radius of about1.125 inches, and the lower clamp portion 53 has a radius of about 1.187inches.

Operation The fully assembled barrel pump is positioned in barrel 11 byinserting the suction tube 23 through the bung hole and engaging thethreads 30 on the outer sleeve of the base with the threads of the bunghole. The pump may be rotated into the bung hole by exerting force onthe spout 13 and the handle 15, and, since there are no threads at thejunctures of the spout head 14 with the pump cylinder and the pumpcylinder with the base, there is no danger that excessive force willdamage the seals between these parts. The pump is rotated until 0- ring38:: provides a fluid-tight seal between the barrel top and the base. Ifwhen the pump is fully tightened within the barrel the spout 13 does notextend inwardly from the bung hole over the barrel top, the clamp 47 maybe loosened and the pump cylinder 18 may be totated or in eitherdirection with respect to the base 22 so that the spout extends over thebarrel top. The clamp may then be tightened, and the camming action ofthe clamp recesses against the lugs 45 and 46 ensures that the pumpcylinder will be urged against the gasket 42.

In the particular embodiment illustrated the projections and recesseswere spaced by 90. It has been found that this spacing allows the spoutto be repositioned so that the container to be filled may be supportedby the barrel top regardless of the original position of the spout afterthe pump is tightened within the barrel bung. It is to be understood,however, that more or less lugs and recesses spaced at smaller or largerintervals may be provided if a greater degree of adjustability isdesired.

Referring to FIG. 9, when the various parts of the base need to becleaned or replaced, they may be readily removed. The only permanentlyjoined parts are outer shell 26 and outer sleeve 27, which may be spotwelded. Even though O-ring 34, inner sleeve 28, and valve 40 are readilyremoved, the oil or other fluid being pumped from the barrel is confinedby inner sleeve 28 to flow through the valve without seepage between theparts of the base. The clamp 47 forces the pump cylinder 18 against thegasket 42, and a fluid-tight seal is maintained between the pumpcylinder, the outer shell 26 and the inner sleeve 28. The pump cylinderalso urges the inner sleeve 28 downwardly against gasket 34 to maintaina fluid-tight seal between the inner sleeve and the flange 32 of theouter sleeve. Gasket 42 is compressed against both the top and bottom ofvalve seat 41 to prevent seepage around the valve. It is thus seen thatnot only does the lug means prevent relative rotation of the pumpcylinder and base, but it ensures a positive seal between the variouscomponents of the base.

While in the foregoing specification, a detailed description of anembodiment of the invention was set forth for the purpose ofexplanation, it is to be understood that many of the details hereingiven may be varied considerably by those skilled in the art withoutdeparting from the spirit and scope of the invention.

I claim:

1. In a barrel pump, a cylinder, a spout mounted on one end of saidcylinder, a generally cylindrical base having an inside diameterslightly greater than the outside diameter of the cylinder, the otherend of said cylinder being slidably received by said base, gasket meanscarried by said base and engaging said other cylinder end to provide aseal between the cylinder and base, lug means on said cylinder and base,and a clamp, said clamp coacting with said lug means for releasablysecuring said cylinder against rotational and sliding movement withrespect to said base, a generally cup-shaped sleeve slidably reoeived bysaid base, the upper end of said sleeve flaring outwardly toward thewall of said base, said gasket means comprising an annular gasketsupported by the flared portion of the sleeve, and second gasket meansbetween the bottom of said sleeve and said base to provide a sealtherebetween, said base being provided with an opening through the sidethereof below the flared portion of the sleeve and an opening throughthe bottom thereof between the second gasket means and the side qr a;base.

2. In a barrel pump, a cylinder, a spout mounted on one end of saidcylinder, a generally cylindrical base having an inside diameterslightly greater than the outside diameter of the cylinder, the otherend of said cylinder being slidably received by said base, gasket meanscarried by said base and engaging said other cylinder end to provide afluid-tight seal between the cylinder and base, a plurality ofcircumferentially spaced projections extending outwardly from saidcylinder and a plurality of circumferentially spaced projectionsextending outwardly from said base, a clamp having a plurality of upperrecesses to receive the projections on said cylinder and a plurality oflower recesses to receive the projections on said base, said projectionsand said recesses being generally cone-shaped to provide a cammingaction to urge said other end of the cylinder against said gasket means,said clamp coacting with said projections for releasably securing saidcylinder in selected rotational positions with respect to said base.

3. In a barrel pump, a cylinder, a spout mounted on one end of saidcylinder, a generally cylindrical base having an inside diameterslightly greater than the out side diameter of the cylinder, the otherend of said cylinder being slidably received by said base, gasket meanscarried by said base and engaging said other cylinder end to provide afluid-tight seal between the cylinder and base, a plurality ofcircumferentially spaced projections extending outwardly from saidcylinder and a plurality of circumferentially spaced projectionsextending outwardly from said base, a clamp having a plurality of upperrecesses to receive the projections on said cylinder and a plurality oflower recesses to receive the projections on said base, said projectionsand said recesses being generally cone-shaped to provide a cammingaction to urge said other end of the cylinder against said gasket means,said clamp coacting with said projections for releasably securing saidcylinder in selected rotational positions with respect to said base, agenerally cupshaped sleeve slidably received by said base, the upper endof said sleeve flaring outwardly toward the wall of said base, saidgasket means comprising an annular gasket supported by the flaredportion of the sleeve, and second gasket means between the bottom ofsaid sleeve and said base to provide a seal therebetween, said basebeing provided with an opening through the side thereof below the flaredportion of the sleeve and an opening through the bottom thereof betweenthe second gasket means and the side of the base.

References Cited UNITED STATES PATENTS 1,899,917 2/1933 Perkins l03-216X 2,687,910 8/1954 Petch et a1. 103216 X 2,853,974 9/1958 Hewitt 103216X 1,471,085 10/1923 Wood 103-218 1,612,740 12/1926 Myers 103-2182,344,005 3/ 1944 Sundholm 222-382 2,451,089 10/1948 Hunter 285-3652,628,596 2/1953 Bachle 285367 2,773,709 12/1956 Smith 285367 WILLIAM L.FREEH, Primary Examiner US. Cl. X.R. 103l78; 222382; 285-365

